CN102307736B - Pneumatic tire - Google Patents
Pneumatic tire Download PDFInfo
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- CN102307736B CN102307736B CN201080007179.3A CN201080007179A CN102307736B CN 102307736 B CN102307736 B CN 102307736B CN 201080007179 A CN201080007179 A CN 201080007179A CN 102307736 B CN102307736 B CN 102307736B
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- major trough
- cell wall
- tire
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/13—Tread patterns characterised by the groove cross-section, e.g. for buttressing or preventing stone-trapping
- B60C11/1353—Tread patterns characterised by the groove cross-section, e.g. for buttressing or preventing stone-trapping with special features of the groove bottom
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/0302—Tread patterns directional pattern, i.e. with main rolling direction
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/0304—Asymmetric patterns
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/0306—Patterns comprising block rows or discontinuous ribs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/04—Tread patterns in which the raised area of the pattern consists only of continuous circumferential ribs, e.g. zig-zag
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/04—Tread patterns in which the raised area of the pattern consists only of continuous circumferential ribs, e.g. zig-zag
- B60C11/042—Tread patterns in which the raised area of the pattern consists only of continuous circumferential ribs, e.g. zig-zag further characterised by the groove cross-section
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C2011/0337—Tread patterns characterised by particular design features of the pattern
- B60C2011/0339—Grooves
- B60C2011/0341—Circumferential grooves
- B60C2011/0344—Circumferential grooves provided at the equatorial plane
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C2011/0337—Tread patterns characterised by particular design features of the pattern
- B60C2011/0339—Grooves
- B60C2011/0341—Circumferential grooves
- B60C2011/0346—Circumferential grooves with zigzag shape
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/13—Tread patterns characterised by the groove cross-section, e.g. for buttressing or preventing stone-trapping
- B60C11/1353—Tread patterns characterised by the groove cross-section, e.g. for buttressing or preventing stone-trapping with special features of the groove bottom
- B60C2011/1361—Tread patterns characterised by the groove cross-section, e.g. for buttressing or preventing stone-trapping with special features of the groove bottom with protrusions extending from the groove bottom
Abstract
Disclosed is a pneumatic tire which comprises a land part (10) and a land part (20). A main groove (50) extending along the tire circumferential direction is formed between the land part (10) and the land part (20). The land part (10) comprises a groove wall (10a) that forms the main groove (50). The land part (20) comprises a groove wall (20a) that forms the main groove (50). The groove wall (10a) and the groove wall (20a) meander along the tire circumferential direction (R) in the tread view, and the groove width of the main groove (50) in the tread width direction (WTR) changes along the tire circumferential direction at a predetermined repetition interval (Lambda). The ratio of the minimum width (WMIN) of the groove to the maximum width (WMAX) of the groove, namely WMIN/ WMAX is within the range of 35-85%.
Description
Technical field
The present invention relates to a kind of air-inflation tyre that is formed with the major trough circumferentially extending along tire, particularly relate to the air-inflation tyre that prevents that drainage from reducing.
Background technology
In the past, in air-inflation tyre, in order to prevent hydroplaning phenomenon, used to have to make to enter into the whole bag of tricks that the drainage of the water between road surface and tyre surface improves.For example, being known to form while facing tyre surface on the cell wall of the major trough circumferentially arranging along tire is the method (for example patent documentation 1) of fleetline pit.According to this air-inflation tyre, can prevent water generates turbulent flow mobile in major trough, thereby improve drainage.
Patent documentation
Patent documentation 1: TOHKEMY 2006-205824 communique (the 5th page, Fig. 1)
Summary of the invention
In above-mentioned air-inflation tyre in the past, there are the following problems.That is, if improve the rigidity of the grounding parts divided by major trough, the rigidity of pattern block specifically, and reduce the quantity of the translot intersecting with major trough, drainage reduction, easily produces the problem of hydroplaning phenomenon.
Therefore, even if the object of the present invention is to provide a kind of in the situation that reduced the air-inflation tyre that the quantity of the translot intersecting with major trough also can prevent that drainage from reducing.
In order to address the above problem, the present invention has following feature.First, the purport of the 1st feature of the present invention is a kind of air-inflation tyre, and it comprises: the 1st grounding parts (for example grounding parts 10), and it extends along tire circumferential (the circumferential R of tire), and for contacting with road surface; And the 2nd grounding parts (for example grounding parts 20), it circumferentially extends along tire, and for contacting with road surface; Between the 1st grounding parts and the 2nd grounding parts, be formed with the major trough (for example major trough 50) circumferentially extending along tire, the 1st grounding parts has the 1st cell wall (for example cell wall 10a) that is used to form major trough, the 2nd grounding parts has the 2nd cell wall (for example cell wall 20a) that is used to form major trough, under the facing of tyre surface, the 1st cell wall and the 2nd cell wall are circumferentially cranky along tire, major trough along tread width direction (tread width direction W
tR) groove width along tire, circumferentially with recurrence interval (cycle λ) of being scheduled to, change, the minimum width part W of groove width
mINmaximum width part W with groove width
mAXratio W
mIN/ W
mAXit is 35%～85% scope.
According to this air-inflation tyre, in major trough, produce the current along the 1st cell wall and the 2nd cell wall.Along the 1st cell wall and the mobile water of the 2nd cell wall, passing through maximum width part W
mAXafter, along with the minimizing of the groove width of major trough, at minimum width part W
mINextended line direction to the streamline along the 1st cell wall and the 2nd cell wall is discharged.
In addition,, according to this air-inflation tyre, because the groove width in the tread width direction of major trough changed with the recurrence interval of being scheduled to, therefore in major trough, mobile current change its tread width direction W with the recurrence interval of being scheduled to
tRon width.
That is, the recurrence interval pulsation of the water in major trough to be scheduled to, at minimum width part W
mINextended line direction to the current along the 1st cell wall and the 2nd cell wall is discharged.
Thereby, according to this air-inflation tyre, owing to also can periodically discharging water mobile in major trough to the outside of major trough in the situation that reduced the quantity of the translot intersecting with major trough, therefore can prevent that drainage from reducing.
In addition, when than W
mIN/ W
mAXin the time of discontented 35%, due to the current along the 1st cell wall and the 2nd cell wall and along the circumferential current of tire at minimum width part W
mINtoo concentrated, therefore can not prevent fully that drainage from reducing.
In addition, when than W
mIN/ W
mAXwhile surpassing 85%, the water in major trough can not pulsed, and can not prevent fully that drainage from reducing.
The purport of the 2nd feature of the present invention is, according to the 1st feature of the present invention, wherein, when establishing the mean length along tread width direction of above-mentioned major trough while being A, meets (W
mAX-W
mINthe relation of)/A≤0.25.
Thus, with (W
mAX-W
mINthe situation of)/A > 0.25 is compared, and can prevent reliably that the rigidity of grounding parts from reducing, thereby can prevent that deceleration and stopping performance from reducing.
In the air-inflation tyre having with respect to the non-symmetrical tread pattern of tire equator line, be known to the technology (for example TOHKEMY 2004-90763 communique) for preventing hydroplaning phenomenon.This is airtyred is used to form the widest groove (hereinafter referred to as thick groove) of width in a plurality of grooves of a plurality of grounding parts, in tread width direction and is positioned at the position (so-called in skew) of departing from from tire equator line.
So, in being set as the vehicle of introversion, inner side while being disposed at vehicle installation due to thick groove with respect to tire equator line, situation about being therefore disposed on tire equator line with thick groove is compared, even in the situation that reduced the quantity of groove, also can make to discharge the drainage performance raising that enters the water between road surface and tyre surface.But the position that only the limits thick groove raising amount of drainage performance is lower, therefore requires further to improve.
The purport of the 3rd feature of the present invention is, according to the of the present invention the 1st or the 2nd feature, wherein, at least one of above-mentioned the 1st grounding parts and above-mentioned the 2nd grounding parts, is formed with the cros-rib tread groove extending along tread width direction.
The purport of the 4th feature of the present invention is, according to the arbitrary feature in the 1st to the 3rd feature of the present invention, wherein, to be provided with the maximum width part W that comprises above-mentioned groove width in above-mentioned major trough
mAXsipes portion, above-mentioned cros-rib tread groove is with respect to tire peripheral, oblique, and is connected with above-mentioned sipes portion or near above-mentioned sipes portion.
The purport of the 5th feature of the present invention is, according to the arbitrary feature in the 1st to the 4th feature of the present invention, wherein, the distance from above-mentioned tire equator line to above-mentioned major trough is 9%～25% of tyre surface ground connection width in above-mentioned tread width direction.
The purport of the 6th feature of the present invention is, according to the arbitrary feature in the 1st to the 5th feature of the present invention, wherein, the 1st cell wall and the 2nd cell wall have predetermined amplitude along tread width direction (amplitude a), the predetermined recurrence interval are 15 times～100 times of predetermined amplitude.
The purport of the 7th feature of the present invention is that, according to the arbitrary feature in the 1st to the 6th feature of the present invention, wherein, major trough is formed with and comprises maximum width part W
mAXsipes portion (the wide 51A of portion), in the bottom of major trough (bottom 50btm), be formed with the protrusion (protrusion 70) towards tire radial outside protuberance, protrusion is formed at sipes portion.
The purport of the 8th feature of the present invention is, according to the 7th feature of the present invention, wherein, 1st sidepiece (sidepiece 70a) relative with the 1st cell wall of above-mentioned protrusion extends along the 1st cell wall, and 2nd sidepiece (sidepiece 70b) relative with the 2nd cell wall of above-mentioned protrusion extends along the 2nd cell wall.
The purport of the 9th feature of the present invention is, according to the 8th feature of the present invention, wherein, under the facing of tyre surface, protrusion attenuates along with the fore-end (front end 70f) near protrusion and rear end part (rear end 70r).
The purport of the 10th feature of the present invention is that, according to the arbitrary feature in the 7th to the 9th feature of the present invention, wherein, the height of protrusion (bump height H70) is less than the degree of depth (major trough depth H 10) of major trough.
According to feature of the present invention, even if can provide a kind of in the situation that reduced the quantity of the translot intersecting with major trough, also can prevent the air-inflation tyre that drainage reduces.
Accompanying drawing explanation
Fig. 1 is for forming the expansion drawing of the airtyred tyre surface of the 1st embodiment of the present invention;
Fig. 2 is for forming the partial enlarged drawing of expansion drawing of the airtyred tyre surface of the 1st embodiment of the present invention;
Fig. 3 is for forming the expansion drawing of the airtyred tyre surface of the 2nd embodiment of the present invention;
Fig. 4 is for forming the partial enlarged drawing of block diagram of the airtyred tyre surface of the 2nd embodiment of the present invention;
Fig. 5 is for forming the part sectional view of the airtyred tyre surface of the 2nd embodiment of the present invention;
Fig. 6 is the expansion drawing of the tyre surface in the air-inflation tyre of comparative example of the present invention;
Fig. 7 means the expansion drawing of the airtyred tread pattern of the 3rd embodiment;
Fig. 8 is near the expansion drawing of major trough of amplifying the 3rd embodiment;
Fig. 9 means the expansion drawing of the airtyred tread pattern of the 4th embodiment;
Figure 10 is near the expansion drawing of major trough of amplifying the 4th embodiment.
The specific embodiment
Then, with reference to the accompanying drawings of the 1st embodiment of the present invention, the 2nd embodiment, the 3rd embodiment, the 4th embodiment, comparative evaluation, other embodiments.In addition, in the record of the following drawings, same or similar part is marked to same or similar Reference numeral.But, need to be careful, accompanying drawing just schematically shows, and the ratios of each size etc. are different from reality.
Thereby, should judge concrete size etc. with reference to the following description.In addition, between each accompanying drawing, certainly also include the different part of relation, ratio of size each other.
(the 1st embodiment)
In the 1st embodiment, the detailed structure of (1.1) airtyred structure, (1.2) major trough, (1.3) effect are described.
(1.1) airtyred structure
Fig. 1 is in the present embodiment for forming the expansion drawing of the tyre surface of air-inflation tyre 1.Each position being formed in tread surface in air-inflation tyre 1 is described.Specifically, (1.1.1) grounding parts, (1.1.2) major trough are described.
(1.1.1) grounding parts
Air-inflation tyre 1 comprises along the circumferential R extension of tire grounding parts 10, grounding parts 20 and grounding parts 30 for contacting with road surface.
On grounding parts 10 and grounding parts 20, be not formed with the translot intersecting with major trough 50.On grounding parts 10 and grounding parts 30, be not formed with the translot intersecting with major trough 60.
(1.1.2) major trough
Air-inflation tyre 1 is included in the major trough 50 extending along the circumferential R of tire between grounding parts 10 and grounding parts 20.Air-inflation tyre 1 is included in the major trough 60 extending along the circumferential R of tire between grounding parts 10 and grounding parts 30.
In addition, in the 1st embodiment, illustrate and take the tread width direction W that the equatorial line CL of tire be to have a common boundary
tRon the structure of a side.Tread width direction W from equatorial line CL
tRon the structure of opposite side identical with said structure, therefore omit detailed explanation here.
(1.2) detailed structure of major trough
Detailed structure to major trough 50 describes.Specifically, use Fig. 1 and Fig. 2 to describe (1.2.1) cell wall, (1.2.2) groove width, the amplitude of (1.2.3) major trough and the detailed structure in cycle.Fig. 2 is representing the expansion drawing of having amplified major trough 50 for forming the tyre surface of air-inflation tyre 1.
In addition, the structure of major trough 60 is identical with major trough 50, therefore omit the detailed description to major trough 60 structures.
(1.2.1) cell wall
(1.2.2) groove width
The minimum width part W of the groove width of major trough 50
mINmaximum width part W with the groove width of major trough 50
mAXratio W
mIN/ W
mAXit is 35%～85% scope.In addition, when establish major trough 50 along tread width direction W
tRmean length while being A, meet (W
mAX-W
mINthe relation of)/A≤0.25.
(1.2.3) amplitude of major trough and cycle
As shown in Figure 2, the groove width of major trough 50 changes with cycle λ along the circumferential R of tire.Cell wall 10a and cell wall 20a are along tread width direction W
tRthere is amplitude a.
Cycle as the groove width of major trough 50 on the circumferential R of tire the cycle λ in the cycle on the circumferential R of tire and the pass between amplitude a are as cell wall 10a and cell wall 20a: cycle λ is 15 times～100 times of amplitude a.
Between the cycle λ of major trough 50 and the cycle λ of major trough 60, stagger the semiperiod.
When tire rolling, the length of the tyre surface contacting with road surface on the circumferential R of tire is that the pass between tyre surface length and the cycle λ of major trough 50 is: tyre surface length is 0.5 times～20 times of cycle λ.
(1.3) effect
As described above, according to the air-inflation tyre 1 of present embodiment, in the interior generation of major trough 50, along the current of cell wall 10a and cell wall 20a, be streamline S
10aand streamline S
20a.Along cell wall 10a and the mobile water of cell wall 20a, passing through maximum width part W
mAXafter, along with the minimizing of the groove width of major trough 50, at minimum width part W
mINto streamline S
10aand streamline S
20aextended line direction discharge.
In addition, according to this air-inflation tyre 1, tread width direction W
tRthe groove width of major trough 50 with cycle λ, change, therefore at the interior mobile water of major trough 50, with cycle λ, change tread width direction W on one side
tRon width flow on one side.
That is, the water in major trough 50 is with cycle λ pulsation, at minimum width part W
mINto streamline S
10aand streamline S
20aextended line direction discharge.
Thereby, according to this air-inflation tyre 1, in the situation that reduced the quantity of the translot intersecting with major trough, also can discharge at the interior mobile water of major trough 50 to the outside of major trough 50, therefore can prevent that drainage from reducing.
In addition, when than W
mIN/ W
mAXin the time of discontented 35%, along the current of cell wall 10a and cell wall 20a and along the current of the circumferential R of tire at minimum width part W
mINtoo concentrated, therefore can not prevent fully the reduction of drainage.
In addition, when than W
mIN/ W
mAXwhile surpassing 85%, the water in major trough 50 can not pulsed, and can not prevent fully that drainage from reducing.
In the present embodiment, because cell wall 10a and cell wall 20a are along tread width direction W
tRhave amplitude a, cycle λ is 15 times～100 times of amplitude a, therefore can effectively to the outside of major trough 50, discharge at the interior mobile water of major trough 50, thereby can further prevent that drainage from reducing.
In addition, cycle λ is the more than 2 times of amplitude a, can prevent fully thus along the current of cell wall 10a and cell wall 20a and circumferential current at minimum width part W
mINtoo concentrated.In addition, cycle λ is below 100 times of amplitude a, can make thus the water in major trough 50 pulse fully, thereby can effectively to the outside of major trough 50, discharge at the interior mobile water of major trough 50.
In the present embodiment, because the cycle λ of major trough 50 and the cycle λ of major trough 60 stagger the semiperiod, therefore, when tire rolling, in major trough 50 and major trough 60, mobile water is alternately pulsed, alternately discharge.
In the present embodiment, tyre surface length is the more than 0.5 times of cycle λ of major trough 50, can make thus major trough 50 when tire rolling along the circumferential R of tire enough to produce the amount ground connection of pulsation.Therefore, can effectively to the outside of major trough 50, discharge at the interior mobile water of major trough 50.
In addition, tyre surface length is below 20 times of cycle λ of major trough 50, and the current along cell wall 10a and cell wall 20a in the interior generation of major trough 50, therefore can discharge at the interior mobile water of major trough 50 to the outside of major trough 50 effectively thus.
(the 2nd embodiment)
In above-mentioned the 1st embodiment, in the major trough 50 of air-inflation tyre 1, cell wall 10a and cell wall 20a are circumferentially cranky along tire, compare W
mIN/ W
mAXbe 35%～85% scope, can periodically to the outside of major trough 50, discharge at the interior mobile water of major trough 50 thus, therefore prevent that the drainage of air-inflation tyre 1 from reducing.
In the 2nd embodiment, be described as follows structure: in major trough, form wide portion, in wide portion, the protrusion towards tire radial outside protuberance is set.
Specifically, in the 2nd embodiment, with reference to Fig. 3 to Fig. 5, the detailed structure of (2.1) major trough, (2.2) effect are described.
Fig. 3 is for forming the expansion drawing of the tyre surface of air-inflation tyre 2 in the 2nd embodiment.In addition, Fig. 4 means the local section block diagram of the air-inflation tyre 2 of the 2nd embodiment.In addition, Fig. 5 means the section-drawing (A-A ' section-drawing of Fig. 3 and Fig. 4) of the air-inflation tyre 2 of the 2nd embodiment.
In addition, in the 2nd following embodiment, the main explanation part different from the 1st embodiment, the repetitive description thereof will be omitted.
(2.1) detailed structure of major trough
As shown in Figure 3, major trough 50 forms and comprises maximum width part W
mAXthe wide 50A of portion.Equally, major trough 50 forms and comprises minimum width part W
mINnarrow portion 50B.Major trough 50 alternately forms the wide 50A of portion and narrow portion 50B along the circumferential R of tire.
As shown in Figure 4, in the bottom of major trough 50, on the 50btm of bottom, form the protrusion 70 towards tire radial outside protuberance.Protrusion 70 is formed at the wide 50A of portion.
The sidepiece 70a of the protrusion 70 relative with the cell wall 10a that is used to form major trough 50 extends along cell wall 10a.
Equally, the sidepiece 70b of the protrusion 70 relative with the cell wall 20a that is used to form major trough 50 extends along cell wall 20a.
The line of centers that protrusion 70 is set to take major trough 50 under the facing of tyre surface is that axis is symmetrical.
As shown in Figure 5, the height of protrusion 70 is bump height H
70along tire height radially from the 50btm of bottom.Bump height H
70the degree of depth that is less than major trough 50 is major trough depth H
10.
(2.2) effect
As discussed above, in the present embodiment, because protrusion 70 is formed at and comprises maximum width part W in the mode towards tire radial outside protuberance
mAXthe bottom 50btm of the wide 50A of portion, therefore in the wide 50A of portion, mobile water conservancy easily flows along cell wall 10a and cell wall 20a with protrusion 70.That is, utilize the protrusion 70 can be to the outside draining of major trough 50, thereby can further prevent that drainage from reducing.
In the present embodiment, because sidewall 70a extends along cell wall 10a, sidewall 70b extends along cell wall 20a, and therefore in the wide 50A of portion, mobile water further easily flows along cell wall 10a and cell wall 20a.Therefore, can further prevent that drainage from reducing.
In the present embodiment, due to protrusion 70 under the facing of tyre surface along with attenuating near front end 70f and rear end 70r, therefore in the wide 50A of portion, mobile water can not flow sharp under the effect of protrusion 70, easily effectively along cell wall 10a and cell wall 20a, flows.
In the present embodiment, the line of centers that is set to take major trough 50 due to protrusion 70 under the facing of tyre surface is that axis is symmetrical, and therefore in the wide 50A of portion, mobile water conservancy easily flows along cell wall 10a and cell wall 20a equably with protrusion 70.
In the present embodiment, due to bump height H
70be less than major trough depth H
10, therefore can in the wide 50A of portion, guarantee fully along the current of the circumferential R of tire.
(comparative evaluation)
Then,, for further effect clearly of the present invention, the comparative evaluation that uses the air-inflation tyre of following comparative example and embodiment to carry out is described.Specifically, (3.1) evaluation method, (3.2) evaluation result are described.In addition, the present invention is not subject to any restriction of these examples.
(3.1) evaluation method
Use 3 kinds of air-inflation tyres to evaluate hydroplaning performance.Under the following condition representing, the data relevant to air-inflation tyre have been measured.
Tire size: 225/45R17
Wheel rim and rim size: 17 * 7J
Tyre kind: conventional tyre (tire beyond studless tire)
Car type: domestic car
Loading condition: the body weight of 600N+ chaufeur
Method of measurement: measure the speed while producing hydroplaning phenomenon under the condition of depth of water 10mm
In addition, in the air-inflation tyre of comparative example, establish the speed that produces hydroplaning phenomenon and be 100 and exponentiate represent evaluation result.
The expansion drawing of the airtyred tyre surface using in comparative example shown in Fig. 6.
As shown in Figure 6, the air-inflation tyre 3 of comparative example is compared with the air-inflation tyre of embodiment, and different is the structure of major trough 2100 and major trough 2101.Specifically, the cell wall that is used to form major trough 2100 and major trough 2101 is not cranky, but forms roughly linearity along the circumferential R of tire, and the cell wall 10a of the major trough 50 of the air-inflation tyre 1 of the embodiment that this point represents from Fig. 1 is different.
(3.2) evaluation result
With reference to each airtyred evaluation result of table 1 explanation.
(table 1)
Known according to this result, to compare with the air-inflation tyre 3 of comparative example, the air-inflation tyre 1 of embodiment 1 and embodiment 2 and air-inflation tyre 2 have excellent hydroplaning performance.
(the 3rd embodiment)
Referring to accompanying drawing, the air-inflation tyre of the 3rd embodiment is described.Specifically, the structure of the structure of the structure of (4.1) airtyred structure, (4.2) major trough, (4.3) protrusion, (4.4) cros-rib tread groove and (4.5) effect are described.
(4.1) airtyred structure
With reference to accompanying drawing, the structure of the air-inflation tyre 200 of the 3rd embodiment is described.Fig. 7 is the expansion drawing of tread pattern of the air-inflation tyre 200 of the 3rd embodiment.In addition, in air-inflation tyre 200, tread width direction W
tRon tyre surface ground connection width TW be more than 215mm.
As shown in Figure 7, air-inflation tyre 200 comprises a plurality of grounding parts 220 that utilize a plurality of major troughs 210 formation of extending along the circumferential R of tire.Specifically, a plurality of major troughs 210 when vehicle is installed inside IN (left side of Fig. 7) while installing to vehicle outside OUT (right side of Fig. 7) comprise major trough 211, major trough 212 and major trough 213.
IN inside when major trough 212 is arranged at vehicle installation with respect to tire equator line CL.Distance B (side-play amount) from tire equator line CL to major trough 212 is 9%～25% of tyre surface ground connection width TW in tread width direction.In addition, in the back the structure of major trough 212 and protrusion 230 is described.
Grounding parts 220 when vehicle is installed inside IN while installing to vehicle outside OUT comprise grounding parts 221, grounding parts 222, grounding parts 223 and grounding parts 224.
Grounding parts 221 be formed at when relying on vehicle and install than major trough 211 inside the position of IN.Grounding parts 222 is formed by major trough 211 and major trough 212.Grounding parts 223 is formed by major trough 212 and major trough 213.Grounding parts 224 be formed at when relying on vehicle and install than major trough 213 outside the position of OUT.
At the upper cros-rib tread groove 240 extending along tread width direction that forms of grounding parts 220 (grounding parts 221～grounding parts 224).In addition, in the back the structure of cros-rib tread groove 240 is described.
(4.2) structure of major trough
With reference to accompanying drawing, the structure of the major trough 212 in above-mentioned major trough 211～major trough 213 is described.Specifically, (4.2.1) is used to form to the cell wall of major trough 212, the groove width W of (4.2.2) major trough 212 describes.In addition, Fig. 8 is near the expansion drawing of major trough 212 of having amplified the 3rd embodiment.
(4.2.1) be used to form major trough 212 cell walls
As shown in Figure 7 and Figure 8, inside during being positioned at vehicle and installing of major trough 212, the grounding parts 222 (the 1st grounding parts) of IN has the cell wall 222A (the 1st cell wall) of the wall of a side that is used to form major trough 212.In addition outside, during being positioned at vehicle and installing of major trough 212, the grounding parts 223 (the 2nd grounding parts) of OUT has the cell wall 223A (the 2nd cell wall) of the wall of a side that is used to form major trough 212.
(4.2.2) groove width of major trough 212 and cycle
As shown in Figure 7 and Figure 8, the groove width W along tread width direction of major trough 212 circumferentially changes with the recurrence interval of being scheduled to along tire.In addition, the groove width W of major trough 212 represents that any point on cell wall 222A is to the distance in the tread width direction of cell wall 223A.
The wide 212A of portion and narrow portion 212B are set on major trough 212.The maximum width part W of the groove width W along tread width direction that the wide 212A of portion comprises major trough 212
mAX, on the other hand, the minimum width part W of the groove width W along tread width direction that narrow portion 212B comprises major trough 212
mIN.The wide 212A of portion and narrow portion 212B alternately arrange on tire is circumferential.
The minimum width part W of the groove width W of narrow portion 212B
mINmaximum width part W with the groove width W of the wide 212A of portion
mAXratio W
mIN/ W
mAXit is 35%～85% scope.
The circumferential cycle λ of tire of cell wall 222A and cell wall 223A is 15 times～100 times of amplitude a.In addition,, when tire rolling, the length that the tire week of the tyre surface contacting with road surface makes progress is 0.5 times～20 times of cycle λ of major trough 212.
(4.3) structure of protrusion
Then, with reference to Fig. 7, the structure of the protrusion 230 of the 3rd embodiment is described.In addition, applicable Fig. 4 during near section explanation represents the major trough 212 of the 3rd embodiment.In addition applicable Fig. 5 during near section explanation represents the major trough 212 of the 3rd embodiment.
As shown in Fig. 7～Fig. 8, protrusion 230 is formed at the wide 212A of portion.Protrusion 230 forms under the facing of tyre surface along the circumferential lengthwise shape of tire.
(4.4) structure of cros-rib tread groove
Then, with reference to Fig. 7, the structure of the cros-rib tread groove 240 of the 3rd embodiment is described.As shown in Figure 7, cros-rib tread groove 240 comprises and cuts apart cros-rib tread groove 240A and terminal cros-rib tread groove 240B.Cut apart cros-rib tread groove 240A and terminal cros-rib tread groove 240B with respect to tire peripheral, oblique, towards tire rotation direction Rt rear and towards tread width direction outside, extend.Cut apart cros-rib tread groove 240A and terminal cros-rib tread groove 240B to extend towards the state of rear bending from tire rotation direction Rt the place ahead.
Cut apart cros-rib tread groove 240A and cut apart grounding parts 220 along tread width direction, be connected with major trough 210.Cut apart cros-rib tread groove 240A comprise be formed at grounding parts 221 cut apart cros-rib tread groove 240A1, be formed at grounding parts 222 cut apart cros-rib tread groove 240A2, be formed at grounding parts 223 cut apart cros-rib tread groove 240A3 and be formed at grounding parts 224 cut apart cros-rib tread groove 240A4.
At least one end of terminal cros-rib tread groove 240B is in the interior termination of grounding parts 220.Terminal cros-rib tread groove 240B comprise be formed at grounding parts 222 terminal cros-rib tread groove 240B2, be formed at the terminal cros-rib tread groove 240B3 of grounding parts 223 and be formed at the terminal cros-rib tread groove 240B4 of grounding parts 224.In addition, on grounding parts 221, be not formed with terminal cros-rib tread groove 240B.
Cut apart cros-rib tread groove 240A2 here, and cut apart cros-rib tread groove 240A3 and be communicated in the wide 212A of portion.Particularly, preferably, by cutting apart cros-rib tread groove 240A2 and cutting apart any one in cros-rib tread groove 240A3, be arranged on from the minimum width part W that is used to form the groove width of narrow portion 212B
mINcell wall 222A and cell wall 223A rise along being used to form the maximum width part W of the groove width of the wide 212A of portion
mAXcell wall 222A and the extended line EX of cell wall 223A on.In addition, in order to reduce noise, cut apart cros-rib tread groove 240A2 and cut apart cros-rib tread groove 240A3 and be arranged to asymmetric with respect to major trough line of centers DC.
Along cutting apart on the extended line S1 of bearing of trend of cros-rib tread groove 240A2, arranging and cutting apart cros-rib tread groove 240A1.In addition, along cutting apart on the extended line S2 of bearing of trend of cros-rib tread groove 240A3, arranging and cutting apart cros-rib tread groove 240A4.
Terminal cros-rib tread groove 240B2 is arranged in adjacent the cutting apart between cros-rib tread groove 240A2 that make progress in tire week.Terminal cros-rib tread groove 240B1 is set on the extended line T1 of the bearing of trend along terminal cros-rib tread groove 240B2.Terminal cros-rib tread groove 240B3 is arranged in adjacent the cutting apart between cros-rib tread groove 240A3 that make progress in tire week.Terminal cros-rib tread groove 240B4 is set on the extended line T2 of the bearing of trend along terminal cros-rib tread groove 240B3.
(4.5) effect
In the 3rd embodiment described above, cell wall 222A and cell wall 223A are circumferentially cranky along tire under the facing of tyre surface, and the groove width W of major trough 212 circumferentially changes with the cycle λ being scheduled to along tire.Thus, the cranky current along cell wall 222A and cell wall 223A in the interior generation of major trough 212.Cycle λ pulsation at the interior mobile water of major trough 212 to be scheduled to, easily from maximum width part W
mAXtowards minimum width part W
mINand along the extended line direction draining of the streamline of cell wall 222A and cell wall 223A.Thereby, can improve more reliably the drainage performance of the water discharge that makes to enter between road surface and tyre surface.
IN inside when in addition, above-mentioned major trough 212 is arranged at vehicle installation with respect to tire equator line CL.Thus, in the time of on being installed to the vehicle that is set as introversion, major trough 212 is configured near the central authorities in the ground plane of the tyre surface contacting with road surface.Therefore, compare with the situation that major trough 212 is disposed on tire equator line CL, can improve more reliably drainage performance.
And cros-rib tread groove 240 is formed at least one of grounding parts 222 and grounding parts 223.Thus, the water between tyre surface ground plane (surface of grounding parts 222 or grounding parts 223) and road surface flows into cros-rib tread groove 240, compares with the situation that is not formed with cros-rib tread groove, becomes and easily to tread width direction outside, discharges.Particularly, by cros-rib tread groove 240 is connected with major trough 212, becomes more reliably and easily to tread width direction outside, discharge.Thereby, can improve more reliably drainage performance.
So, owing to can improving more reliably drainage performance, result can prevent hydroplaning phenomenon.
In the 3rd embodiment, the minimum width part W of the groove width W of major trough 212
mINmaximum width part W with the groove width W of major trough 212
mAXratio W
mIN/ W
mAXit is 35%～85% scope.Thus, along cell wall 222A and the mobile water of cell wall 223A, passing through maximum width part W
mAXafterwards, along with reducing of the groove width W of major trough 212, and more easily at minimum width part W
mINextended line direction draining to the streamline along cell wall 222A and cell wall 223A.That is, the water capacity in major trough is easily towards tread width direction outside.Thereby, can improve more reliably drainage performance.
In addition, compare W
mIN/ W
mAXbe more than 35%, thus along the current of cell wall 222A and cell wall 223A and can be at minimum width part W along the circumferential current of tire
mINtoo concentrated, can prevent more reliably that drainage performance from reducing.On the other hand, due to than W
mIN/ W
mAXbe below 85%, so the water capacity in major trough 212 easily pulses, can improve more reliably drainage performance.
In the 3rd embodiment, cros-rib tread groove 240 (cut apart cros-rib tread groove 240A2 and cut apart cros-rib tread groove 240A3) is connected with the wide 212A of portion.Thus, along cell wall 222A and the mobile water of cell wall 223A, passing through maximum width part W
mAXafterwards, along with reducing of the groove width W of major trough 212, and more easily at minimum width part W
mINextended line direction draining to the streamline along cell wall 222A and cell wall 223A.That is the water capacity, becoming in major trough 212 is easily gone towards tread width direction outside.
In the 3rd embodiment, the distance B (side-play amount) from tire equator line CL to major trough 212 is 9%～25% of tyre surface ground connection width TW in tread width direction.Thus, mode that can be corresponding with the setting with various camber angles, configures major trough 212 near the central authorities in the ground plane of the tyre surface contacting with road surface.Therefore, can manufacture the air-inflation tyre corresponding with various camber angles 200.
Therefore in addition, distance B is more than 9% and below 25% of tyre surface ground connection width TW, is being set with under the state of camber angle, easily makes major trough 212 be configured near the central authorities in the ground plane of tyre surface contact with road surface, becomes and easily prevents drainage performance reduction.
In the 3rd embodiment, cycle λ is 15 times～100 times of amplitude a.Thus, owing to can effectively discharging at the interior mobile water of major trough 212 to the outside of major trough 212, therefore can further improve drainage performance.
Therefore in addition, cycle λ is the more than 15 times of amplitude a, along cell wall 222A and cell wall 223A current and can be at minimum width part W along the circumferential current of tire
mINtoo concentrated.On the other hand, cycle λ is below 100 times of amplitude a, therefore can make the water in major trough 212 fully pulse, thereby can effectively to the outside of major trough 212, discharge at the interior mobile water of major trough 212.
In the 3rd embodiment, on the bottom 112F at the wide 212A of the portion place of major trough 212, form the protrusion 230 towards tire radial outside protuberance.Thus, utilize protrusion 230 that the water capacity mobile in the wide 212A of portion is easily flowed along cell wall 222A and cell wall 223A.That is, utilize protrusion 230 that the water capacity mobile in the wide 212A of portion is easily discharged to cros-rib tread groove 240 (cut apart cros-rib tread groove 240A2 and cut apart cros-rib tread groove 240A3).Therefore, can effectively discharge mobile water in the wide 212A of portion, thereby improve more reliably drainage performance.
In the 3rd embodiment, the sidepiece 230c relative with cell wall 222A of protrusion 230 extends along cell wall 222A, and the sidepiece 230c relative with cell wall 223A of protrusion 230 extends along cell wall 223A.Thus, can make water mobile in the wide 212A of portion more easily along cell wall 222A and cell wall 223A, flow.
In the 3rd embodiment, protrusion 230 attenuates along with the rear end 30b at the front end 30a near tire rotation direction Rt the place ahead and tire rotation direction Rt rear under the facing of tyre surface.Thus, water mobile in the wide 212A of portion can not flow sharp under the effect of protrusion 230, becomes and easily effectively along cell wall 222A and cell wall 223A, flows.
In the 3rd embodiment, protrusion 230 be set to take under the facing of tyre surface major trough line of centers DC as axis symmetrical.Therefore, water conservancy mobile in the wide 212A of portion is easily flowed equably along cell wall 222A and cell wall 223A with protrusion 230.
In the 3rd embodiment, the height H of protrusion 230 is less than the depth D of major trough 212.Thus, the situation more than being the depth D of major trough 212 with the height H of protrusion 230 is compared, and can in the wide 212A of portion, guarantee fully along the circumferential current of tire.
(the 4th embodiment)
Referring to accompanying drawing, the air-inflation tyre 200A of the 4th embodiment of the present invention is described.In the air-inflation tyre 200A of the 4th embodiment, be provided with major trough 210, the grounding parts 220 of the air-inflation tyre 1 of many 3rd embodiments.Specifically, the structure of (5.1) airtyred structure, (5.2) cros-rib tread groove and (5.3) effect are described.In addition, the identical part of air-inflation tyre 200 with above-mentioned the 3rd embodiment is marked to identical Reference numeral, different parts is mainly described.
(5.1) airtyred structure
First, with reference to accompanying drawing, the structure of the air-inflation tyre 200A of the 4th embodiment is described.Fig. 5 means the expansion drawing of tread pattern of the air-inflation tyre 200A of the 4th embodiment.In addition, in air-inflation tyre 200A, tread width direction W
tRon tyre surface ground connection width TW be more than 303mm.
As shown in Figure 9, major trough 210 when vehicle is installed inside IN while installing to vehicle outside OUT comprise major trough 211, major trough 212, major trough 213, major trough 214 and major trough 215.Major trough 214 and major trough 215 are along the circumferential linearly extension of tire.In addition, the structure of other major troughs 210 is identical with the content illustrating in the 3rd embodiment.
Grounding parts 220 when vehicle is installed inside IN while installing to vehicle outside OUT comprise grounding parts 221, grounding parts 222, grounding parts 223, grounding parts 224, grounding parts 225 and grounding parts 226.Grounding parts 225 is formed by major trough 214 and major trough 215.Grounding parts 226 be formed at when relying on vehicle and install than major trough 215 outside the position of OUT.In addition, the structure of other grounding parts 220 is identical with the content illustrating in the 3rd embodiment.
(5.2) structure of cros-rib tread groove
Then, with reference to Fig. 5, the structure of the cros-rib tread groove 240 of present embodiment is described.As shown in Figure 9, cros-rib tread groove 240 comprises and cuts apart cros-rib tread groove 240A and terminal cros-rib tread groove 240B.Cut apart cros-rib tread groove 240A and terminal cros-rib tread groove 240B with respect to tire peripheral, oblique.Cut apart cros-rib tread groove 240A and terminal cros-rib tread groove 240B to extend towards the state of rear bending from tire rotation direction Rt the place ahead.
Cut apart cros-rib tread groove 240A except cut apart cros-rib tread groove 240A1, cut apart cros-rib tread groove 240A2 and cut apart cros-rib tread groove 240A3, also comprise be formed at grounding parts 225 cut apart cros-rib tread groove 240A5, be formed at grounding parts 226 cut apart cros-rib tread groove 240A6.In addition, at grounding parts 224, be not formed with and cut apart cros-rib tread groove 240A.
Terminal cros-rib tread groove 240B, except terminal cros-rib tread groove 240B2, terminal cros-rib tread groove 240B3 and terminal cros-rib tread groove 240B4, also comprises the terminal cros-rib tread groove 240B1 that is formed at grounding parts 221 and the terminal cros-rib tread groove 240B5 that is formed at grounding parts 225.In addition, at grounding parts 226, be not formed with terminal cros-rib tread groove 240B.
Along cutting apart on the extended line S2 of bearing of trend of cros-rib tread groove 240A3, arranging and cutting apart cros-rib tread groove 240A5 and cut apart cros-rib tread groove 240A6.That is, terminal cros-rib tread groove 240B4 is to intersect with extended line S2 and to extend towards the state of the direction bending contrary with this extended line S2.
(5.3) effect
In the 4th embodiment, identical with the 3rd embodiment, owing to can improving more reliably the drainage performance that enters into the water between road surface and tyre surface, result can prevent hydroplaning phenomenon.Particularly, because the tyre surface ground connection width TW of air-inflation tyre 200A is greater than the tyre surface ground connection width TW of the air-inflation tyre 200 of the 3rd embodiment, therefore above-mentioned effect is remarkable.
(6) comparative evaluation
Then,, for further effect clearly of the present invention, the comparative evaluation that uses the air-inflation tyre of following comparative example and embodiment to carry out is described.Specifically, with reference to table 2, (6.1) each airtyred structure, (6.2) evaluation result are described.In addition, the present invention is not subject to any restriction of these examples.
(table 2)
(6.1) each airtyred structure
In the air-inflation tyre of comparative example 1, a plurality of grooves (for example thick groove) that contribute to the linearity of drainage performance among major trough are most set on tire equator line CL.In the air-inflation tyre of comparative example 2, for example, when a plurality of grooves that contribute to the linearity of drainage performance among major trough most (thick groove) are arranged on vehicle and install with respect to tire equator line CL inside IN.
In the air-inflation tyre of embodiment, when the major trough 212 that contributes to drainage performance among major trough 210 is most arranged on vehicle and installs with respect to tire equator line CL inside IN.In addition, the air-inflation tyre 200 illustrating in the 3rd embodiment is as front-wheel, and the air-inflation tyre 200A illustrating in the 4th embodiment is as trailing wheel.
(6.2) evaluation result
Making to be provided with each airtyred vehicle travels with speed 80km/h, the right wheel that only makes to be installed on this vehicle travelled on the rainwater road of depth of water 10mm and accelerates, if being installed on the speed that produces velocity contrast (skidding) between the left and right two-wheeled of vehicle is " hydroplaning phenomenon produces speed ", measures and removed the average velociity of measuring after speed minimum and maximum in 5 times.
Its result, as shown in table 2, can learn following situation: compare with the airtyred vehicle that comparative example 1 and comparative example 2 are installed, the airtyred vehicle that embodiment is installed is higher because hydroplaning phenomenon produces speed, therefore can prevent hydroplaning phenomenon.
(other embodiments)
As described above, by embodiments of the present invention, disclose content of the present invention, but should not be construed as the present invention, be limited to this discussion that becomes a disclosed part and accompanying drawing.Those skilled in the art can learn various alternate embodiments, embodiment and application technology according to the disclosure content.
For example, embodiments of the present invention can change as follows.
In the above-described embodiment, cell wall 10a and cell wall 20a are cranky along the circumferential R of tire under the facing of tyre surface, but that cell wall 10a and cell wall 20a do not need is cranky, for example, also can be arranged to local linearly along the circumferential R of tire.
In the above-described embodiment, cell wall 10a and cell wall 20a change with recurrence interval of being scheduled to along the circumferential R of tire under the facing of tyre surface, in one-period, when with maximum width part W
mAXduring for boundary, front side and rear side become symmetrical shape.But cell wall 10a and cell wall 20a need to be in one-periods, when with maximum width part W
mAXduring for boundary, front side and rear side become symmetrical shape, for example, also can be arranged to the shape that groove width sharply narrows down at rear side.
In addition, the tyre surface ground connection width TW that air-inflation tyre 100 has been described in the 3rd embodiment is situation more than 215mm, in the 4th embodiment, illustrated that the tyre surface ground connection width TW in tread width direction is situation more than 303mm in air-inflation tyre 100A, but the invention is not restricted to this, also can make the tyre surface ground connection width TW in tread width direction be less than 215mm or be less than 303mm.
In embodiment, illustrated and utilized a plurality of major troughs 210 to form the situation of a plurality of grounding parts 220, but the invention is not restricted to this, also can utilize at least 1 major trough 210 to form 2 grounding parts 220.
In embodiment, illustrated that cell wall 222A and cell wall 223A are set to take major trough line of centers DC as the symmetrical situation of symmetric line, but the invention is not restricted to this, also can be set to as shown in Figure 10 asymmetric with respect to major trough line of centers DC.
In embodiment, the situation that the groove width W that the major trough 212 that only contributes to most drainage performance among a plurality of major troughs 210 has been described circumferentially changes with the recurrence interval of being scheduled to along tire, but the invention is not restricted to this, also can make other major troughs 210 also along tire, circumferentially with the recurrence interval of being scheduled to, change.
In embodiment, the situation of IN inside having illustrated when the major trough 212 that contributes to drainage performance among a plurality of major troughs 210 is most arranged at vehicle and installs with respect to tire equator line CL, but the invention is not restricted to this, in the time of also can being arranged at vehicle and installing with respect to tire equator line CL outside OUT.In the case, comparatively effective in the time of on being installed to the vehicle that is set as flare.
In embodiment, illustrated on the bottom of major trough 212 (not shown) situation of protrusion 230 has been set, but the invention is not restricted to this, also protrusion 230 can be set.In addition, can change aptly according to object the shape of protrusion 230.
In embodiment, illustrated that cros-rib tread groove 240 comprises the situation of cutting apart cros-rib tread groove 240A and terminal cros-rib tread groove 240B, but the invention is not restricted to this, also can only include any one that cut apart in cros-rib tread groove 240A and terminal cros-rib tread groove 240B.
In embodiment, illustrated and cut apart cros-rib tread groove 240A and terminal cros-rib tread groove 240B with respect to the situation of tire peripheral, oblique, but the invention is not restricted to this, also can cut apart cros-rib tread groove 240A and terminal cros-rib tread groove 240B along the setting of tread width direction.In addition, cut apart cros-rib tread groove 240A and terminal cros-rib tread groove 240B and not necessarily must extend with crooked state, also can linearlyly extend.
In embodiment, illustrated and cut apart cros-rib tread groove 240A2 and cut apart the situation that cros-rib tread groove 240A3 is connected with the wide 212A of portion, but the invention is not restricted to this, can not be communicated with the wide 212A of portion yet.
In embodiment, illustrated and cut apart cros-rib tread groove 240A2 and cut apart the situation that cros-rib tread groove 240A3 is connected with major trough 212 (the wide 212A of portion), but the invention is not restricted to this, for example, also can make one end of terminal cros-rib tread groove 240B be connected with major trough 212.In addition, cut apart cros-rib tread groove 240A2 and cut apart cros-rib tread groove 240A3 and not necessarily must be connected with the wide 212A of portion, both can be set near the wide 212A of portion, also can be set to be communicated with or be close to narrow portion 212B.
In embodiment, illustrated in order to reduce noise, to cut apart cros-rib tread groove 240A2 and cut apart cros-rib tread groove 240A3 and be set to the non-symmetrical situation with respect to major trough line of centers DC, but the invention is not restricted to this, also can be set to take major trough line of centers DC as symmetric line symmetrical.So, can change aptly according to object the shape of cros-rib tread groove 240.
So, the present invention comprises not in the nature of things at various embodiments of this record etc.Thereby technical scope of the present invention is only determined by the specific item of invention of the appropriate claims based on above-mentioned explanation.
In addition, the present invention is with reference to the full content of No. 2009-027705th, Japan's patent application (on February 9th, 2009 files an application), Japan's patent application No. 2009-139242 (on June 10th, 2009 files an application) and be introduced in the application's specification sheets.
utilizability in industry
According to the present invention, owing to the quantity of the translot intersecting with major trough can being controlled to Min. and preventing that drainage from reducing, and therefore can be applicable to the air-inflation tyre of designability and appearance property excellence.。
description of reference numerals
1,2 air-inflation tyres; 10,20,30 grounding parts; 10a, 20a cell wall; 50,60 major troughs; 50btm bottom; 110 translots; The wide portion of 51A; 51B narrow portion; 70 protrusions; 70a, 70b sidepiece; 70f front end; 70r rear end; 200,200A air-inflation tyre; 210 (211～215) major trough; The wide portion of 212A; 212B narrow portion; 212F bottom; 220 (221～226) grounding parts; 222A, 223A cell wall; 230 protrusions; 230a front end; 230b rear end; 230c, 230d sidepiece; 240 cros-rib tread grooves; 240A (240A1～240A6) is cut apart cros-rib tread groove; 240B (240B1～240B5) terminal cros-rib tread groove.
Claims (8)
1. an air-inflation tyre, comprising:
The 1st grounding parts, it circumferentially extends along tire, and for contacting with road surface; And
The 2nd grounding parts, it circumferentially extends along above-mentioned tire, and for contacting with above-mentioned road surface;
Between above-mentioned the 1st grounding parts and above-mentioned the 2nd grounding parts, be formed with the major trough circumferentially extending along above-mentioned tire,
Above-mentioned the 1st grounding parts has the 1st cell wall that is used to form above-mentioned major trough,
Above-mentioned the 2nd grounding parts has the 2nd cell wall that is used to form above-mentioned major trough,
Under the facing of tyre surface, above-mentioned the 1st cell wall and above-mentioned the 2nd cell wall are circumferentially cranky along above-mentioned tire,
The groove width along tread width direction of above-mentioned major trough circumferentially changes with the recurrence interval of being scheduled to along above-mentioned tire,
The minimum width part W of above-mentioned groove width
mINmaximum width part W with above-mentioned groove width
mAXratio W
mIN/ W
mAXbe 35%～85% scope,
Above-mentioned major trough is formed with and comprises above-mentioned maximum width part W
mAXsipes portion,
In the bottom of above-mentioned major trough, be formed with the protrusion towards tire radial outside protuberance,
Above-mentioned protrusion is formed at above-mentioned sipes portion,
1st sidepiece relative with above-mentioned the 1st cell wall of above-mentioned protrusion extends along above-mentioned the 1st cell wall, and 2nd sidepiece relative with above-mentioned the 2nd cell wall of above-mentioned protrusion extends along above-mentioned the 2nd cell wall.
2. air-inflation tyre according to claim 1, wherein,
When establishing the mean length along tread width direction of above-mentioned major trough while being A, meet (W
mAX-W
mINthe relation of)/A≤0.25.
3. air-inflation tyre according to claim 1, wherein,
On at least one of above-mentioned the 1st grounding parts and above-mentioned the 2nd grounding parts, be formed with the cros-rib tread groove extending along tread width direction.
4. air-inflation tyre according to claim 1, wherein,
In above-mentioned major trough, be provided with the maximum width part W that comprises above-mentioned groove width
mAXsipes portion,
Cros-rib tread groove is with respect to tire peripheral, oblique, and is connected with above-mentioned sipes portion or near above-mentioned sipes portion.
5. air-inflation tyre according to claim 1, wherein,
From tire equator line to the distance of above-mentioned major trough, it is 9%～25% of tyre surface ground connection width in above-mentioned tread width direction.
6. air-inflation tyre according to claim 1, wherein,
Above-mentioned the 1st cell wall and above-mentioned the 2nd cell wall have predetermined amplitude along above-mentioned tread width direction, and the above-mentioned predetermined recurrence interval is 15 times～100 times of above-mentioned predetermined amplitude.
7. air-inflation tyre according to claim 1, wherein,
Under the facing of above-mentioned tyre surface, above-mentioned protrusion is along with attenuating near the fore-end of above-mentioned protrusion and rear end part.
8. air-inflation tyre according to claim 7, wherein,
The height of above-mentioned protrusion is less than the degree of depth of above-mentioned major trough.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009027705A JP5468789B2 (en) | 2009-02-09 | 2009-02-09 | Pneumatic tire |
| JP2009-027705 | 2009-02-09 | ||
| JP2009139242A JP5320172B2 (en) | 2009-06-10 | 2009-06-10 | Pneumatic tire |
| JP2009-139242 | 2009-06-10 | ||
| PCT/JP2010/051875 WO2010090327A1 (en) | 2009-02-09 | 2010-02-09 | Pneumatic tire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102307736A CN102307736A (en) | 2012-01-04 |
| CN102307736B true CN102307736B (en) | 2014-02-26 |
Family
ID=42542212
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201080007179.3A Active CN102307736B (en) | 2009-02-09 | 2010-02-09 | Pneumatic tire |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US9452643B2 (en) |
| EP (1) | EP2394823B1 (en) |
| CN (1) | CN102307736B (en) |
| BR (1) | BRPI1008662A2 (en) |
| WO (1) | WO2010090327A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5366852B2 (en) | 2010-02-09 | 2013-12-11 | 株式会社ブリヂストン | tire |
| JP5635170B1 (en) * | 2013-10-23 | 2014-12-03 | 株式会社ブリヂストン | Pneumatic tire |
| FI125377B (en) * | 2014-01-17 | 2015-09-15 | Nokian Renkaat Oyj | Vehicle tire |
| CN104015569A (en) * | 2014-05-26 | 2014-09-03 | 厦门正新橡胶工业有限公司 | Special tire tread pattern structure of motorcycle for race in rainy day |
| DE102014225613A1 (en) * | 2014-12-11 | 2016-06-16 | Continental Reifen Deutschland Gmbh | Vehicle tires |
| NO2795041T3 (en) * | 2015-06-01 | 2018-01-27 | ||
| DE102017219532A1 (en) | 2017-11-03 | 2019-05-09 | Continental Reifen Deutschland Gmbh | Commercial vehicle tires |
| JP7027908B2 (en) * | 2018-01-23 | 2022-03-02 | 住友ゴム工業株式会社 | tire |
| JP7027907B2 (en) * | 2018-01-23 | 2022-03-02 | 住友ゴム工業株式会社 | tire |
| WO2021060033A1 (en) * | 2019-09-24 | 2021-04-01 | 株式会社ブリヂストン | Motorbike tire |
| CN111873719A (en) * | 2020-08-12 | 2020-11-03 | 合肥工业大学 | Main groove noise reduction structure in low-noise tire |
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- 2010-02-09 WO PCT/JP2010/051875 patent/WO2010090327A1/en active Application Filing
- 2010-02-09 CN CN201080007179.3A patent/CN102307736B/en active Active
- 2010-02-09 US US13/148,418 patent/US9452643B2/en active Active
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Also Published As
| Publication number | Publication date |
|---|---|
| EP2394823B1 (en) | 2014-04-30 |
| WO2010090327A1 (en) | 2010-08-12 |
| BRPI1008662A2 (en) | 2016-03-08 |
| CN102307736A (en) | 2012-01-04 |
| EP2394823A1 (en) | 2011-12-14 |
| EP2394823A4 (en) | 2013-05-22 |
| US9452643B2 (en) | 2016-09-27 |
| US20120018068A1 (en) | 2012-01-26 |
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